Grinding attachment for lathes



v C. HARDY.

Gamma .ATTACHMENT Foa LATHEs.. y 'APPLICATION FIL'ED JUNE E?, 19|?-14,368,499. Patented Feb. 15, 1 921.

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1111// .llllllllli c? ATTORNEY UNITED s'rn'rgsrarnur oFFlcr..

CHARLES HARDY, GE' CONEY SLAND,"NE'W YORK.

GRINIDING ATTAGHMENT EUR LATHES.

Application filed .Tune 9,

To all wim/m, t may concer/n.:

Be it known that I, CHARLES HARDY, residing at Coney lslanchin thecounty of Kings and State of New York, have invented certain new anduseful improvements in Grinding Att-achn ents for Lathes, of which. thefollowing is a specification.

This invention relates to. a grinding attachment for lathes.

The object of the invention is to provide a simple, inexpensive andyethighly eiiicient device of this character. A further and moredetailed object is to provide a grinding attachment and means whereby itmay be adjustably connected with the lathes so as to be capable of adjustment to dispose the grinding element in various planes with respectto the rotating axis of the lathe.

A further object j is to provide means whereby the grinding element ofthe attachment may be connected therewith in different ways so as toacconnnodate it for the different types oflworlr which it is desirablethat itV shall perform.

Other objects and aims of the invention, more or less specific thanthose referred to above,'will be in part obvious and in part pointed outin the course of the following description of the elements,combinations, arrangements of parts and applications of principles,constitutingthe invention; and the scope of protection contemplated willbe indicated in the appended claims. j

In the accompanying drawings which are to be taken as a part of thisspecification, and in which l have shown merely a preferred form ofembodiment ofthe invention:

Figure l is a side elevational view of the attachment showing the samein operative position upon a lathe.

Fig. 2 is an enlarged view of the attachment detached and shown inhorizontal section substantially upon the plane of line ll of Fig. l. l

Fig. 3 is an end view of one of the bearing sleeves employed, and

Fig. 4l is a diagrammatic detail view, on a reduced scale showing adifferent manner of attaching the grinding element.

Referring to the drawings for describing in detail the structure whichis illustratedtherein, the reference character L indicates the lathesupporting the part 1 which ordinarily is employed to carry the toolpost,

Specification of Letters Patent.

.Patented Feb. 15, 1921.

1917. sei-m1 No. 173,723.

the part 1 being movable transversally of the lathe bed through themedium of the guide Z and being movable longitudinally7 of the lathe bedthrough the mediiun of the guide 3 in the usual manner so that the toolpost member 1 may be adjusted in any horizontal direction.

vThe reference character G indicates a threaded standard which issupported by the partl in the location ordinarily occupied by thetoolpost, the tool post being temporarily removed, and the referencecharacter H indicates the grinding attachment proper which is supportedby the standard G to project laterally therefrom in a horizontal plane".

The standard G is provided with a head Ll at its lower end which engagesbeneath the shoulders 5, of the part 1 and a clamp nut 6 is threadedupon the standard to engage the top surface of the shoulders 5 to gripsaid shouldersbetween the nut and the head so as to retain the standardin a rigid vertical position. il'he length of the standard is preferablysuch as to extend for some distance above `the horizontal plane of therotating axis as 7 of the lathe.

.The attachment proper consists of a body member S and a spindlecarrying member 9.

The body member 8 is apertured as at 10, to telescope over the standardGV and is adapted to be held in any position of vertical adjustmentalong lthe standard by meansof a pair of clamp nuts 11 and 12 which arethreaded upon the standard', one below and one above the body member. Atits outer end it carries a stud 13 which is formed with an annulargroove 14; therein. A flat annular surface 15 is provided surroundingthe stud.

The spindle carrying member 9 is provided at its inner end with a socket1G adapted to receive the stud 13 and with a flat annular surface 1"(Aadapted tores't fiat against thesurface 15 of the body member whenassembled.

TheseY parts afford a convenient radial adjustment of the member 9 withrespect to the body member, and a set screw 18, which is carried by themember 9 engages within the groove 14: to hold the member 9 in anyposition of radial adjustment and also to retain the member 9 againstdisconnection from the stud.

At its outer end the spindle carrying member is bifurcated to forma pairof legs 19 and 2O with an open space between them 'adapted to receive adrive pulley 21. The

ends of the legs 19 and 2O are enlarged and each is apertured to receivea bearing sleeve 22. The sleeves 22 are rigidly fixed 1n positionpreferably by being driven into the central. portion thereof whichbridges the space between the legs 19 and 20. The outer, or left hand,end of the spindle is enlarged toV provide a hea-d 24 and theinnersurlace as 26, of this head is cone-shaped and is received inacorrespondingly shaped depression formed in the outer end of theadjacent bearing 22. From the inner end of the cone-shaped portion 24 tothe inner endV of the adjacent sleeve 22 the spindle is slightly taperedas indicated at 26, and the bearing opening in the sleeve is likewisetapered to provide a snug fit.

The inner end portion of the spindle is continued at a reduced diameteras at 27, so as to facilitate assembling7 as'will be readily understood,and the bearing connection with the inner sleeve 22 is provided by meansof a bearing sleeve 28 which is iitted to the part 27 of the spindle andwhich is formed with a head 29 providing a cone surface 30 and with atapered portion l31 providing` an outwardly tapering exterior surfacesimilar to that described at the outer end of the spindle.

' The two bearing sleeves 22 are of identical shape and the cone-shapedseats and tapering' openings thereof are in opposed relation. Each isprovided with a shoulder 32 at its outer end for engaging against theouter surface of the legs 19 and 20 to limit possible inward movement atall times. The

bearing member 28 is connected with the spindle in such a manner as tohave a slight longitudinal movement upon the spindle'but no rotarymovement. This is effected by means of a pin 33 which is carried by thebearing member and which extends into a runway 34 formed longitudinallyof the spindle. The adjacentY end portion of the spindle is threaded asat 35 Vand carries a clamp nut 36 by means of which the bearing membermaybe slid to cause it to move in one direction while drawing the spinpdie in the opposite direction, thus causing the cone and tapered partsof the spindle and bearuig member 28 to assume a proper rotatingrelation within the bearing mem-V bers 22. A. set screw 37 may becarried by the clamp nut 36 to retain it against possible accidentalmovement.

The pulley 2l is connected to the spindle by meam'of a set screw 38which extends into a longitudinal slot 39 formed in the spindle, wherebyto provide the necessary movement of the spindle for the adjustmentformed with a small longitudinal groove 4l at its inner surfaceterminating short ofthe two ends of said surface as clearly vndicated,and with a passage 42 extending from the groove 41 through the sleeve tothe'oil cup, the oil cup being carried by the respective leg of themember 9 and the aperture 42 being continued through the material of theleg to the oil cup.

v t the outer end of the spindle the head 24 is provided with a reducedextension 43 adapted to receive the grinding wheel .44. The retainingscrew 45 is threaded into the end of the spindle to retain the grinderiirmly in position.

ln some instances' it is desirable that the grinder be supported at agreater orless distance from the head 24 and for this reason it 1scontemplated that an extension piece, as shown at 46 in Fig. 4 may beemployed carrying the grinder` at its outer end. L

The extension piece 46 may be connected to rotate with the spindle byany desired means but preferably it is formed with a tapered inner endportion 47 adapted to lbe received within av tapered seat 4S formed atthe outer end of the spindle. The seat is formed as a conicalenlargement-cf a central bore 49 which extends throughout the length ofthe spindle, and a tiebolt() extends through this bore into threadedengagement with the inner end of the extension 46, the bolt having ahead 51 for engaging the inner end surface of the spindle wherebyrotation of the bolt will draw the tapered portion 4T of the, extensioninwardly into firm engagement with the spindle.

rlhe threads, as 52, for receiving the inlio ner end of the screw .45are formed within the bore 49 at the inner end of the seat4tl, and itwill be noted that the seat 4S, by its conical shape, provides adesirable means for Y lathe, it is apparent that a vast number ofdiperent operations may be performed upon the work in a simple,eflicient and expeditious manner. Various parts of the work may bemilled, ground or polished while the work is rotating in the lathe, Thehelix angle of threads may be readily ground, or operations may beperformed either interiorl or exteriorly of the work.

ny suitable means, as the drive wheel 53, and belt 54, may be employedfor driving the spindle through the medium of the pulley 21.

lt is to be particularly noted that the axis of rotation of the member 9about the stud 13 extends so that it directly intersects the axis ofrotation of the spindle. Also that the point of intersection with theaxis of the spindle is directly in the center of the pulley 2l. lt willthus be seen that rotation of the member 9 about the stud 13 willproduce no appreciable movement of the member la longitudinally of therotating axis of the lathe. Also, and what is perhaps more important,that rotation of the member 9 about the stud will produce no bodilyshifting of the position of the pulley 2l. lllhe position of the centerof the pulley will remain unchanged so that the drive belt 5a will beable to continue its driving function without likelihood of causingtrouble such as might arise if the center of the pulley be made toshift.

As many changes could be made in the construction without departing fromthe scope of the invention as deiined in the following claims, it isintended that all matter contained in the above description or shown inthe accompanying drawings, shall be interpreted as illustrative only andnot in a limiting sense.

Having thus described my invention what l claim as new and desire tosecure by Letters Patent is:

l. A grinding attachment for lathes comprising, a grinder carryingmember, a support therefor comprising a substantially vertical standardfrom which said member projects in a substantially horizontal position,and said member including a part within which the grinder is rotatablymounted and means whereby said part is rotatably connected foradjustment about a horizontal axis, the axial line of which intersectsthe rotating aXis of said grinder.

2. A grinding attachment for lathes comprising, a grinder carryingmember, a spindle upon which the grinder may be directly^ mounted, saidspindle being rotatably carried by said member, an extension memberthrough the medium of which the grinder may be indirectly connected withthe spindle, and said spindle having parts adapted to receive andremovably retain said eXtension member.

3. A grinding attachment for lathes comprising, a grinder carryingmember, a spindle adapted for directly carrying the grinder, saidspindle being rotatably mounted in said member, and the spindle having alongitudinal bore therethrough terminating in a conical seat at one endthereof, the conical seat being adapted to receive an extension-memberand the remainder of the bore being adapted to receive a tightening bolttherethrough for engaging the eXtension member to retain the extensionmember within thev seat, whereby the grinder may be supported by theextension in rigid relation to the spindle.

e. A grinding attachment for lathes comprising a grinder carryingmember, supporting means adapted to be connected with the bed of thelathe for movement therealong, a standard carried by said supportingmeans proj ecting` upwardly therefrom, the grinder carrying member beingconnected with said standard, being rotatable thereabout in asubstantially horizontal plane and being vertically adjustable along thelength of the standard, and means for retaining said grinder carryingmember in any position of vertical and rotary adjustment upon saidstandard.

5. A grinding attachment for lathes comprising a grinder carryingmember, a support therefor, comprising a Standard which projectsupwardly from said support` the grinder carrying member being connectedwith said standard, being rotatable thereabout in a substantiallyhorizontal plane and being vertically adjustable along the length of thestandard, means for retaining said grinder carrying member in anyposition of vertical and rotary adjustment upon said standard, and saidgrinder carrying member including a Separate part with which the grinderis connected and means whereby said separate part is rotatablyadjustable about a horizontal axis.

In testimony whereof I affix my signature in the presence of twowitnesses.

CHARLES HARDY.

Witnesses:

L. Gnssronn nanny, AARON BENJAMIN.

